#include <REGX52.H>
#include <intrins.h>

void Delay(unsigned int xms)		//@11.0592MHz
{
	unsigned char i, j;
	while(xms)
	{
		_nop_();
		i = 2;
		j = 199;
		do
		{
			while (--j);
		} while (--i);	
		xms--;
	}
}


void main()
{
	while(1)        
	{              //A 10 B 11 C 12 D 13 E 14 F 15 
		P2=0xFE;     //1111 1110
		Delay(500);  
		P2=0xFD;     //1111 1101
		Delay(500);
		P2=0xFB;     //1111 1011
		Delay(500);
		P2=0xF7;     //1111 0111
		Delay(500);	
		P2=0xEF;     //1110 1111
		Delay(500);
		P2=0xDF;     //1101 1111
		Delay(500);
		P2=0xBF;     //1011 1111
		Delay(500);
		P2=0x7F;     //0111 1111
		Delay(500);	
	}
}